| Feature | Description |
| -------------------- | ----------------------------------------------------------------------------------- |
| Processor | Espressif ESP-32 |
| Dimensions | 68 x 26 mm - same shape as Märklin C-track decoder |
| Input voltage | approx. 9V to 24V DC (smoothed DC), digital current, AC with support capacitor |
| Power outputs | 4 |
| Max. total current | 2 A |
| Interfaces | 2 CTC IR-balises (each max. 12mA), NFC reader (instead of second IR-balise) |
| Standby current | approx. 20mA at 16V |
| Boot current | approx. 50mA at 16V plus switching current for output initialization |
The CTC-Turnout-Module is available in three versions:
- With one Märklin plug and a socket strip for installation in a C-track turnout or C-track crossing.
- With two Märklin plugs for installation in a C-track three-way turnout.
- With two 3-pin socket strips and mounting holder for all other electromagnetic drives with 2 coils.
In the overview "Switching with CTC " you will find further modules and links to installation instructions.
Version with one Märklin plug
This version is intended for installation in Märklin C-track turnouts. Additionally, another electromagnetic drive with 2 coils each can be connected, e.g. a semaphore signal.
Version with two Märklin plugs
This version is intended for installation in Märklin C-track three-way turnouts.
"Universal" version with cables
This version is intended for two electromagnetic drives with 2 coils each. The included mounting holder allows the CTC-Turnout-Module to be screwed under the model railway layout.
Pin assignment
The current (second) series has been delivered since July 2021. It can be identified by the laterally protruding electrolytic capacitor (shown in the pictures below left), which enables operation with AC and un-smoothed DC. The wiring always corresponds to one of the three versions mentioned above.
Connection
Notes:
- When selecting the input voltage, please remember that motors, lamps, etc. connected to the CTC module must also be able to handle this voltage
Standard configuration
- Connect the contacts Track-A and Track-B to the track or power supply. It does not matter whether it is a digital control unit or a power supply, as long as the maximum voltage of 24 V is not exceeded. Since there is a rectifier at the input, it does not matter which pole you connect to Track-A and Track-B.
- Connect the power supply of the turnout drive (positive pole, yellow cable in Märklin) to W1-VBB or W2-VBB.
- Connect the switching terminals of the turnout drive (negative pole, blue cables with green or red plug in Märklin) to W1-Green and W1-Red or W2-Green and W2-Red.
- Connect the CTC-IR-balise to IR1-GND (negative pole, green) and IR1-VCC (positive pole, red) or IR2-GND and IR2-VCC. Please also refer to the datasheet of the CTC-IR-balise . Under no circumstances forget the resistor (typically 1 kOhm, min. 330 Ohm) in the IR-balise, otherwise the turnout module will be damaged.
- Connect the NFC reader to NFC RX, NFC TX as well as GND and VCC. Please note that the second IR-balise and the NFC reader cannot be used simultaneously.
- Connect LEDs to one of the terminals LED-1 to LED-3 and GND. When connecting a signal light, you may need to remove resistors, as LED-1 to LED-3 already have a 1 kOhm resistor each and switch against 3.3 volts.
The assignment of the pins for switching can be configured in the app (Cfg.xml), as well as the duration of the switching pulse.
Archive
Pin assignment first series
The first series was delivered until June 2021. The wiring was individually agreed with each customer.
Notes:
- The LED connection is parallel to the LED on the PCB and must not be loaded with more than 12mA in total (the LED has a 150 Ohm resistor)
- By adjusting the ioCfg.xml, the I2C connections can be used for an NFC reader with current firmware - please contact us if required.
- Without support capacitor, this (old) module is only suitable for operation with switched-mode power supplies